Lawn sprinkler



Sept 23,1930- c. c. ARMsTRoNG 1,776,714

LAWN S PRINKLER Filed Jan. 29. 1929 Invnbr.'

` CHARLES C. ARMSTRONG, OF HUNTINGTON, WESTIZ'IRGINIA, ASSIGNOR T0 .TI-IEARM Patented Sept. 23, 1930 ,y UNITED STATES PATENT STRONG ELECTRIC AND MANUFACTURING CORPORATION, OF HUNTINGTON, TTEST` VIRGINIA, A CORPORATION OF DELAWARE LAWN settimane.

Application mea January as, ieee. seriai No.v 335,858. i

The invention consists in the features and combinationand arrangement of parts hereinafter described and particularly pointed out in the claims. y

In the drawings:

Figure 1 is a plan view of the lawn sprinkler.

Fig. 2 is a side elevation, partly in section.

Fig. 3 illustrates transverse sections taken at various points `1e-a, J-J), c-c.

Fig. l is a bottom plan of the sprinkler.

The vane of the sprinkler is made up of an upper sheet metal plate l, the edge of which is spun over the bottom sheet metal plate 2. i

The vane arms increase in width fromthe axial center of the sprinkler towards their outer ends, being of greatest width at the point A, from which point the width of the vane decreases progressively to its extreme outer end.

The vane has one edge B of each arm straight and ,the other edge C shaped on a. compound curve, and the straight edge of one arm is diagonally opposite the straight edge of the other arm. The upper and lower plates of the arms are arched transversely thereof. The arch of the lower plate is for the purpose of strengthening the same against the pressure of water, which enters the arm through the centrally disposed head D rotatably mounted on the fitting E through which water is'eonducted to the vane through the supply connection F.

The transverse arch formation conforms to the varying widths of the vane arms at various points. In other words, the arch formation near the center of the sprinkler is struck on a short radius, while the arch formation at, say, the point A is struck on what may be conveniently described as a long radius, though it Vwill be understood that the arch is not, as a matter of fact, struck on a curve which is a true segment of a circle. The height of the arch varies, it being of less height near the center of the sprinkler than at the outer portions of the arms. Its greatest height is at about the v point A', and its increase in height from the inner end of the vane arm tothe point A is from the other openings.

gradualil other way, 1tmay be saidthat at theinner' endf of the arm the wall of the arched formation is steeply inclined, or^curved, Whereas at the widest point A the'wall ofthe arch is' fata 4lovverlangle toA the-horizontal and particularly! on the compundcurved sidel ofythe arm, andthe steepnessi-of the raisedA wall-""falong this y compound v edgefi decreases f gradually from the'innerI end ofthe arm'to the point A. Along the straight side of theI armthe arched Acurve is abrupt.Vl The row ofA perforations for the discharge of the water follows the compound curvedside fof the vane arm, and at all pointsthesaid perforations arevat approximately the same dis` tance from thesaidedge. In making the upper plate of the vane, the perforations are` lirstpunched in the platefand thereafter the plate is shaped `,up intolthea'rch form shown andbecause of. the progressive "variation in theshape of thev arch'` delivery takejplace.

different directions of In other words,-the fw'aterfis"directedfat varying levels,:the innermost opening delivering.` :its stream 'directly upward. 1 Further- To describe the formation an-` mvorefbyreason ofthe curve from pointA v tothe extreme end vof the Varmbeing reversed in respect tofthe other parts of the corr 1pound.`A curve `resulting inla substantially tapering formationA atrthe endof the arm, and beca-"use1 the row of openings :follows the curve of the armfat .this point, the delivery ofthe streams v pfrom,"say, the lastthree opening's,lwill be in a diiferent direction (or outwardly from the arm) in respect to the direction of the streams rIhe relative distance of the openings from the longitudinal center line of the arm, together with the curve of the wall of the arch, also enters into the matter of stream direction. The openings atl `or near the extreme outer ends of the arms are larger in diameter than the other openings. y y Y The vanehas attachedv at its center a head D in the form of a sheet metal cup-shaped member, the bottom liange 5 of which turns upon a fitting E. This fitting is enlarged at 7 forming upper and lower shoulders 8-.-9. The hollow cup-shaped head hasits flange rotatively mounted on the fitting above said shoulder 8.

A second member l is screw threaded upon the cup-shaped head and has a flange a 5 reachinglyrunder. the lower shoulder. 9 with packing-interposedat l1. This gifves two point bearing to the central rotating part of the s rinkler. The fitting screws into any suita le-.nipplef F which'v connects'` with thev m hose-101- supply-pipe.v

I claim: l. A lawn sprinkler comprising elongated hollow arms of sheet metal, radiatin'gvfrom a central rotatable headthrough which thev arms are supplied with'water, saidarms increasin'gin' width; from lsaid. head outwardlyand having their upper armsl arched trans-z Verse1y,vthe widthofsaid arched portion n-V creasing ntowardsthe outer endsof the arms, 23;; and being: formedfon curves of. progressively, longer radii-towards-said outer ends, one edge" ofeachy arm beingy curved between itsY inner and'outer ends-and the upper wallV thereof4 havingarow of'perf'orations located approxi-V 25: matelyv at the-same-.distancethroughout ,fromv said curved edge,.whereby the axes-.of said perforations are at relatively differentangles-v to.v distribute the streams of water issuing therefrom.- Y K Y 39@ 2. Alawnsprinkler accordingto claimxl havingradiating .hollow vane armsv of arched formation in cross section, kone *edge of each Vane-Lann. beingstraightv andthe other edge x is A-in theshape ofYa-compound curve, the arch 351: formation-at alla. pointsl along the, armk eX-h` tending-fromthe straightzedge to the, comipoundcurved edgefand a,row of perfora-i tions following the saidcompound curved: Vedge,substantiallyjas described. 10v 3.V In the. formation of aflawnsprinkler" Vane,v the hereindescribedmethod consistingin p erforatinga plate with a rowof openings A along acompoundcurve and then:l upsetting.- said. plateintoY .arched form'y ofincreasing: width, intermediate its ends; and of a shapeY along, one edge conforming to the compound;V curVe-of-ctherow of openings.- Y

In testimony whereof I aix my signature-1.-` 5u Y CHARLES CJARMSTRONG. 

